How do I return the favour to lying cold callers **&&^%(??

Just had a call to my home work number asking about the warranty on my boiler. Completely made up and using my other half's name. Lost the chance of stringing him along all the way to the CC details (wasn't thinking quickly enough). When I asked for detail on the boiler make he hung up.

I have the company name, I have seen its website and the service he was flogging matches the company name.

How do I return the favour - I want this lot spammed!! And yes, I am in a bad mood....